分析试验室
分析試驗室
분석시험실
ANALYTICAL LABORATORY
2010年
4期
64-67
,共4页
宋诗稳%于浩%刘珍叶%刘锐晓%齐广才
宋詩穩%于浩%劉珍葉%劉銳曉%齊廣纔
송시은%우호%류진협%류예효%제엄재
修饰电极%碳纳米管%聚吡咯%亚铁氰化钾%亚硝酸盐
脩飾電極%碳納米管%聚吡咯%亞鐵氰化鉀%亞硝痠鹽
수식전겁%탄납미관%취필각%아철청화갑%아초산염
Modified electrode%Carbon nanotube%Polypyrrole%Ferrocyanide%Nitrite
采用循环伏安法在滴涂碳纳米管的电极表面制备了聚吡咯/K_4Fe(CN)_6复合膜,研究了该电极的电化学性质及对NO_2~-的电催化还原.结果表明,固定于聚吡咯膜中的K_4Fe(CN)_6作为电子递质与碳纳米管和聚吡咯对NO_2~-电还原具有协同催化作用,安培法检测NO_2~-的线性范围为1.5×10~(-6)~1.8×10~(-3) mol/L,检出限为3.0×10~(-7) mol/L,该法已用模拟水样中NO_2~-的测定.
採用循環伏安法在滴塗碳納米管的電極錶麵製備瞭聚吡咯/K_4Fe(CN)_6複閤膜,研究瞭該電極的電化學性質及對NO_2~-的電催化還原.結果錶明,固定于聚吡咯膜中的K_4Fe(CN)_6作為電子遞質與碳納米管和聚吡咯對NO_2~-電還原具有協同催化作用,安培法檢測NO_2~-的線性範圍為1.5×10~(-6)~1.8×10~(-3) mol/L,檢齣限為3.0×10~(-7) mol/L,該法已用模擬水樣中NO_2~-的測定.
채용순배복안법재적도탄납미관적전겁표면제비료취필각/K_4Fe(CN)_6복합막,연구료해전겁적전화학성질급대NO_2~-적전최화환원.결과표명,고정우취필각막중적K_4Fe(CN)_6작위전자체질여탄납미관화취필각대NO_2~-전환원구유협동최화작용,안배법검측NO_2~-적선성범위위1.5×10~(-6)~1.8×10~(-3) mol/L,검출한위3.0×10~(-7) mol/L,해법이용모의수양중NO_2~-적측정.
A Fe(CN)_6~(4-) doped polypyrrole film was fabricated onto the surface of the MWNT dropped composite ceramic electrode (CCE) via electrochemical polymerization. Its electrochemical behavior towards nitrite reduction was investigated using cyclic voltammetric and amperometric techniques. The experimental results showed that the resulting electrode exhibited high sensitivity towards the reduction of nitrite. Under the optimal conditions, the cathodic peak current showed a linear relationship with the concentration of nitrite in the range from 1.5×10~(-6) to 1.8×10~(-3) mol/L with a detection limit of 3.0×10~(-7) mol/L. This method has been applied to the determination of nitrite in stimulant water samples.